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High Hopes For Aquaponics System Inspired By Sewage Treatment
“Our work shows that this type of cultivation is not only more sustainable, but it is also capable of providing nutrients in a form that is easily accessible to plants
by The Fish Site
30 June 2021
A novel water purification system inspired by sewage plants has been shown to be effective at optimizing fish waste for use as fertilizer for plants in aquaponics facilities.
In a recent study, researchers demonstrated that the system could improve nutrient remineralization for the plants, while removing excess nitrogen and carbon from the system, creating a healthier environment for fish.
The study, published in Frontiers in Plant Science, was undertaken by researchers from the Department of Marine Sciences at the University of Gothenburg and involved the production of rainbow trout and lettuce.
As lead author, Victor Lobanov explained to Frontiers Science News: “Fish sludge is a waste product made up of uneaten food and fish feces and is normally broken down by bacteria in the water. In addition to physically harming fish gills, excess carbon in the solids leads to excessive bacterial growth – diminishing oxygen in the water and hampering the ability of the fish to breathe. We wanted to find out whether this waste could be used to fertilize plants in aquaponics systems by removing the excessive carbon, yet preserving the minerals needed for growing crops.”
The researchers investigated a potential solution inspired by sewage and wastewater treatment plants found around the world, called enhanced biological phosphorus removal (EBPR). They adapted it so that the risk of bacteria build-up in the water was reduced, but the minerals from the fish waste were soluble in the water and could therefore be biologically available for plants to take up.
They found that their solid treatment system was as effective at delivering nutrients from the fish waste to the aquaponic system as a commercial nutrient solution. Although the fertilizer did not meet plant needs entirely, as some nutrients such as manganese were missing, the researchers hope to optimize this system in future studies.
“Hopefully we can scale the system more efficiently in the future, not just for lettuce as used in this study but as well as for other plants, with the right number of fish corresponding to the size of the system. By further optimizing the breakdown of fish solids by the solid treatment system, we can also achieve a faster treatment rate and make the whole process more efficient,” explained Lobanov.
Commercial fertilizer solutions often have very high levels of nitrogen, stimulating crops to swell and absorb large amounts of water and giving the appearance of improved growth but often decreasing the amounts of minerals in the plant. Despite the fertilizer created by the solids treatment system containing lower levels of nitrogen than commercially available chemical fertilizers, plants were not nutrient deficient. This suggests that the high nitrogen levels commonly used are in excess of what the plants need. The authors hope that this finding will stimulate further research into the connections between plant nutrients, health, and taste,
“Our work shows that this type of cultivation is not only more sustainable, but it is also capable of providing nutrients in a form that is easily accessible to plants. Farmers can take this system and optimize it for their specific crops and production volumes, potentially even supplementing with additional nutrients if required,” said Lobanov.
Lead photo: The aquaponics facility where the trial took place. © Victor Lobanov
Meet The Extra-Terrestrial Aquaponics Pioneer
Former salmon farmer Dr. Carl Mazur aims to design an aquaponics system that could one day be used on Mars. In the meantime, he aims to use it to produce high-value fish and flowers on Earth
Rob Fletcher
May 8, 2021
Former salmon farmer Dr. Carl Mazur aims to design an aquaponics system that could one day be used on Mars. In the meantime, he aims to use it to produce high-value fish and flowers on Earth.
Can you tell us a bit about your aquaculture experience?
Dr. Carl Mazur, founder of Terra-Mars
My aquaculture experience is primarily with saltwater salmon production on the east and west coast of Vancouver Island, in Canada. I gained hands-on experience immediately after graduation from McGill University with a degree in marine biology. This was in the mid-1980s and the issues we had with fish loss due to bacterial kidney disease at the time lead me to pursue a master’s and then a Ph.D. at UBC, focused on the effects of rearing and environmental fish stressors on their immune systems and disease susceptibility.
The Terra-Mars project may be ambitious in the long run but it aims to start with more modest goals
Why did you decide to return to the sector and what inspired you to look into aquaponics specifically?
I returned to the sector after owning and operating a national licensing, sales, and distribution in Canada focused on providing human tissue regeneration products to dental and medical specialists across Canada for 15 years. I returned as I had always intended to do so and had gone to the biotech sector to support my family and to learn business lessons that I could then bring back to the aquaculture/aquaponics sector. My first love is “all things marine” and it’s great to be back in a sector where I feel at home.
The reason for migrating a short step from aquaculture to aquaponics is that I feel aquaponics is more holistic in that a well-conceived aquaponic system can essentially be near-closed and self-sustaining. Aquaponics systems today do need external input in the form of fish feed which then provides carbon, nitrogen, and phosphorous (and other trace elements) for plant growth. The next step in closing the loop will be to produce fish feed from the carbon, nitrogen, and phosphorous delivered from the system in the form of human food, fish offal, and the inedible stem and root plant products.
From aquaponics to aquaponics on Mars, that sounds like quite a leap. What's the logic?
The simple premise behind developing an aquaponic system for use on Mars [as part of the Terra-Mars project] is that a system advanced enough to be on Mars will be able to grow food anywhere on Earth, with modifications. The ultimate goal is to have a system that can provide food security for any environment on Earth and thereby end the suffering that still occurs in some developing countries. Having the ambitious goal of developing a food production system for Mars should provide ample PR exposure which can then be leveraged to promote the project and help to carry it forward.
It must be noted that the initial systems will be produced on a small scale and will be developed to produce high-value fish for the ornamental aquarium fish sector and high-value plants for the fine dining and floral industries. The technologies developed for these high-valued products will later be used for larger projects which will produce higher volume, lower value products for middle class consumers. Eventually, we will transition to industrial-scale operations for low price, mass consumption products. This model is borrowed from the automotive industry, as demonstrated and proven by Tesla motors.
What species of fish are you thinking of growing in your system on Mars?
The three species of fish we’ve shortlisted to date for Mars are tilapia, barramundi and Arctic char. We’ll need to test many species under the simulated Earth environment that we’ll attempt to create in our simulated Martian environment.
Are you able to apply the skills that you gained in the conventional aquaculture sector for the project?
Yes, many of the skills gained in the conventional aquaculture sector (especially related to fish health and nutrition) can certainly be used with this project.
Who are your key collaborators and what do they bring to the project?
The key collaborator for this project is Dr. James Rakocy, known worldwide as the “father of aquaponics”. Dr. Rakocy has had a distinguished 30-year career at the University of the Virgin Islands and his UVI aquaponic system is known worldwide as the best researched and established system for growing tilapia and a variety of greens including lettuces and herbs. Dr. Rakocy is the author of the seminal book Aquaponic Q&A. His educational aquaponic systems are used in over 1,100 high schools across America for foundational teaching in the STEM areas of biology, chemistry, math, and food systems.
Other key collaborators are Garth Wardell, CEO / owner of Allsite IT, a digital intelligence firm currently dedicated to the advancement of intense data solutions for the hospitality and healthcare sectors. Garth is very keen about this project and has been a trusted advisor since 2018. Several other advisors in the areas of law, engineering, computer science, multimedia technologies, education, urban farming, and accounting are also on standby and eager to begin work on this project.
The other noteworthy collaborator is Dr. Christopher McKay, an astrobiologist at the NASA Ames research centre in California, who has offered assistance at the academic level and must sit as an unpaid advisor, as is mandated for all full-time NASA employees.
How have your plans been received to date?
The plans have been very well received to date, most notably by Elon Musk who was informed of the intentions several years ago and stated that “this will be very important down the road”. Mr Musk was presented the concept for informational uses only and was not approached for funding or resources, as he had intense funding and resource requirements at Tesla and SpaceX at the time.
How the system might one day appear
How much money are you hoping to raise for the project and what will you use this for?
The initial round of financing for this project will be for $2.6 million and will be used to:
Develop a first aquaponic system prototype.
Secure an IP patent portfolio of aquaponic patents.
Build a physical model of the Space Exploration Theme park
Develop a mixed reality (VR&AR) tour of the park
Perform an extensive feasibility study for the project.
What are the key milestones for your project?
Obtain the initial round of seed funding.
Become cash-flow positive with the acquisition of existing ancillary businesses in the fish, vegetable and floral, growth, packaging, distribution, retail, media and entertainment sectors.
Building global brand recognition for Terra-mars products and entertainment facilities.
Acquisition of real estate (primarily distressed suburban shopping malls) where the aquaponic facilities will be installed to grow the fish and plants for local distribution to populations in North America and Europe.
Series A financing round to raise $100 million in 2023 or 2024 at the latest.
What is the end goal for your project and do you think that this is feasible to achieve in your own lifetime?
The end goal for phase one of the project is to have four Space / Mars exploration theme parks – one in North America, one in Europe, one in MENA, and one in China. These will have the dual purpose of entertainment and providing research facilities for Mars colonization technologies, featuring the aquaponic food production system. Other technologies for Mars colonization will be in the fields of transportation, communications, housing, healthcare, and recreation.
If you don’t make it to Mars, where will you target using your aquaponics systems on the Earth?
If we don’t make it to Mars, the aquaponic system will first be used to produce high value fish and plants for Western markets and eventually be developed in for larger commercial operations to be used anywhere on earth.
What are the major challenges that you still need to overcome?
The major challenges which we need to overcome are to raise the initial round of financing and to become cashflow positive in the shortest time possible.
Rob Fletcher
Senior editor at The Fish Site
Rob Fletcher has been writing about aquaculture since 2007, as editor of Fish Farmer, Fish Farming Expert and The Fish Site. He has an MA in history from the University of Edinburgh and an MSc in sustainable aquaculture from the University of St Andrews. He currently lives and works in Scotland.
Our Monthly Webinar For April Is “Training The Next Generation of Aquaponic Farmers” From Researcher Sarah Milliken At The University of Greenwich, U.K.
Ms. Milliken will introduce an open access aquaponics curriculum, Aqu@teach, specifically developed for college students with a focus on entrepreneurial and transferable skills
The Webinar Will Take Place Live, Saturday,
April 17 From 11 am To 12 pm EST And Feature A Live Q&A.
Click Below To Register:
REGISTER: Training the Next Generation of Aquaponic Farmers
Ms. Milliken will introduce an open access aquaponics curriculum, Aqu@teach, specifically developed for college students with a focus on entrepreneurial and transferable skills. As soilless food production technologies become increasingly important in light of climate change and the threat of food insecurity, there is an urgent need to provide an appropriately trained workforce.
The Webinar is free to the public during the live broadcast. The Webinar will remain available for free, in perpetuity, to all Aquaponics Association Members in the Member’s Area of our Community Site.
Special thanks to Ed "Aqua-Eddie" Tivnan, Association Director of STEM Aquaponics, for organizing the webinar.
Hope to see you there!
Brian Filipowich, Chairman
Aquaponics Association
The Aquaponics Association
1240 Evarts Street, NE
Washington, DC 20018
Aquaponics Letter To The Biden-Harris Transition Team
In the Letter, the Aquaponics Association requests that the incoming Administration consider three actions to support the growth of aquaponics
January 7, 2021
The Aquaponics Association has sent a letter to the Leadership of the Biden-Harris Transition team for the U.S. Departments of Agriculture and Commerce.
View the Aquaponics Letter to the Biden-Harris Transition
In the Letter, the Aquaponics Association requests that the incoming Administration consider three actions to support the growth of aquaponics: 1) fully establish the USDA Office of Urban Agriculture and Innovative Production; 2) recognize new and emerging food production systems, such as aquaponics systems, as critical suppliers of food; and 3) ensure that aquaponics remains eligible for USDA Organic Certification.
Aquaponics will further establish the United States as a leader in sustainable agriculture and build a better future for generations to come.
Aquaponics Association Presenting The 2020 Aquaponics Conference, "Cultivating the Future", Online Oct. 16-18
The theme, "Cultivating the Future", signifies that the Conference will explore our Vision for the next generation of aquaponics. Live Panel Discussions will convene experts in all fields of aquaponics to discuss overcoming the roadblocks to more aquaponic growing
The Aquaponics Association is presenting The 2020 Aquaponics Conference, "Cultivating the Future", October 16-18, to connect growers from around the world and expand the practice of aquaponics.
Conference Website: https://aquaponicsconference.org/
The theme, "Cultivating the Future", signifies that the Conference will explore our Vision for the next generation of aquaponics. Live Panel Discussions will convene experts in all fields of aquaponics to discuss overcoming the roadblocks to more aquaponic growing.
The Conference will feature four Learning Tracks: Aquaponics in STEM Education; Community Aquaponics; Aquaponics Research; and Commercial Aquaponics. The Conference will feature over 50 sessions including Instructional Lessons; Virtual Tours; Live Panel Discussions; Live Q&A Sessions; Guest Breakout Discussions; Keynote Presentations; and even "Virtual Cocktail Hour"!
The Conference will be held on the Run The World virtual events platform. This interactive platform features live sessions; live breakout discussions, direct messaging, and group chats between all attendees; and live speaker polls so that guests can actively participate in the Conference.
Early Bird tickets are only $149 for the full three-day conference - $100 savings. The ticket includes access to recordings of all conference content and all-conference slide presentations through the end of 2020.
The Aquaponics Association is a nonprofit, Member-based organization that expands the practice of aquaponics through education, advocacy, and connection. The Conference will continue the Association's Mission of expanding the practice of aquaponics.
contact: Brian Filipowich